Question

Ok i have 10 questions i have answered and i want to know if the answer i put is correct. PLLLLEEEEAASEEE help? (: Here is the first one:

The equation, y = 12841(1.01)x , represents the average cost of an education at a private college, after 1990. What is the average cost in 1990 (x = 0)?

A. $12,969
B. $12,841
C. $13,122
D. $13,099

my answer was B. Correct or incorrect?

Answer 1

Is that supposed to be \[12,841*(1.01)^{x}\]?

Answer 2

yea sorry typo ^^

Answer 3

Just checking. Since something raised to the 0 power is 1, you have 12,841*1, so yes, I agree with answer B.

Answer 4

Woo! thanks (: ok next one is :

Using the equation, y = 12841(1.01)x, predict the cost of an education in a private college in the year 2010. Use x = 20 as this is 20 years after 1990. Round to the nearest year.

A. $14,908
B. $20,628
C. $15,668
D. $19,652

i put C correct? or Incorrect? lol

Answer 5

Yep.

Answer 6

Okie dokie next :

Using the equation, y = 20,000(0.95)x, predict the purchasing power of $20,000 ten years later.

A. $14,560
B. $10,255
C. $11,975
D. $12,635

i put C again (: rite? or wrong? (:

Answer 7

Yep, C again.